Claude Code Grammar Check

<img src="icon.svg" width="128" alt="vinta/hal-9000 icon">

A grammar check on your prompt while you type, with explanations in Traditional Chinese. The corrections show up above the prompt box, before you hit Enter.

Installation

This plugin needs a local Ollama with the gemma4:31b-mlx model:

ollama pull gemma4:31b-mlx

It's a mod, so it also needs Claude Code 2.1.287 or later.

claude plugin marketplace add vinta/hal-9000
claude plugin install hal-grammar-check@hal-9000

Then restart Claude Code.

Usage

Just type. About 250ms after you stop, the draft goes to Ollama and the result shows up above the prompt box. A result for an older draft is dropped.

hal-statusline checks each prompt after you submit it. To avoid seeing both, turn that one off with HAL_STATUSLINE_GRAMMAR_CHECK_DISABLED=1 in your environment variables.

Privacy

It sends the first 500 characters of your draft to your local Ollama at localhost:11434. Fully offline, nothing leaves your machine.

Screenshots